Maharaja Yudhisthira was the elder cousin of Lord Krsna, and therefore while departing from him the Lord bowed down at the King's feet. The King embraced Him as a younger brother, although the King knew perfectly well that Krsna is the Supreme Personality of Godhead. The Lord takes pleasure when some of His devotees accept Him as less important in terms of love. No one is greater than or equal to the Lord, but He takes pleasure in being treated as younger than His devotees. These are all transcendental pastimes of the Lord. The impersonalist cannot enter into the supernatural roles played by the devotee of the Lord. Thereafter Bhima and Arjuna embraced the Lord because they were of the same age, but Nakula and Sahadeva bowed down before the Lord because they were younger than He.